Hey there @JKL00
Welcome to the community
BYOP lines would have no contract linked to it so the impact on your account should be limited. That said, you did mention that you have 2 lines on your account, do you perhaps have a promotion for a second line?
We'd also hate to see you go, and we'd be happy to take a closer look if you'd like to review your account before proceeding with the port out. We advise you to reach out to us at these channels for assistance, though we'll be sending you a PM this time. Talk to you soon!